SPF Flattening Tool

What is SPF flattening?

SPF (Sender Policy Framework) flattening is the process of simplifying SPF records by consolidating multiple DNS lookups into a single, efficient entry.

Email servers often impose a limit of 10 DNS lookups for SPF records, and going over this limit can cause SPF authentication to fail, leading to email deliverability issues.

SPF flattening keeps your records compliant and optimized without exceeding lookup limits.

SPF flattening features

Free and easy to use: Use our tool at no cost, with a simple interface for quick SPF flattening.

DNS lookup optimization: Consolidates all DNS queries into a single SPF record to stay within the 10-lookup limit.

Dynamic record updates: Keeps your SPF record up-to-date with any changes in email sending infrastructure.

Improved deliverability: Reduces the chances of SPF failures and helps ensure emails reach your recipients’ inboxes.

Service provider compatibility: Works seamlessly with major email providers like Google Workspace, Microsoft 365, and more.

How does this SPF flattening tool work?

1. Input your SPF record: Copy and paste your existing SPF record into the tool.
2. Generate flattened SPF: The tool consolidates the record, removing unnecessary DNS lookups.
3. Update your DNS settings: Copy the flattened record and add it to your domain's DNS configuration.
4. Validate and monitor: Use the tool’s built-in validation to check compliance and monitor email deliverability performance.

How to prevent issues with SPF flattening

SPF flattening solves many deliverability challenges, but it's important to address potential issues to ensure smooth implementation. Here’s how to handle common concerns:

Keep records updated

Flattened SPF records are static, meaning they won’t automatically reflect changes in your email provider’s infrastructure. This can lead to outdated records that fail authentication.

Avoid exceeding DNS record size limits

Flattened SPF records can grow large if multiple IPs and services are included, potentially exceeding DNS record size limits.

Ensure provider compatibility

Some email service providers may have unique requirements that don’t align with flattened SPF records. Failing to account for these nuances could lead to failed email authentication.